HEFA-1999 Part 1/2nd proof - Human Fertilisation & Embryology ...
HEFA-1999 Part 1/2nd proof - Human Fertilisation & Embryology ...
HEFA-1999 Part 1/2nd proof - Human Fertilisation & Embryology ...
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HUMAN FERTILISATION AND EMBRYOLOGY AUTHORITY<br />
<strong>1999</strong> ANNUAL REPORT & ACCOUNTS<br />
monitor the situation. Patients concerned should be encouraged to<br />
discuss this with their doctor.<br />
Guidance for Centres<br />
Regarding the Use of<br />
Blastocyst Transfer in<br />
Treatment<br />
The WGNDRT has recognised that the practice of embryo transfer at the<br />
blastocyst stage has become widespread. Work on cattle and sheep shows<br />
that prolonged embryo culture followed by blastocyst transfer can, in<br />
some cases, give rise to neonatal problems, notably increased birthweight<br />
and fetal abnormalities. There is no evidence so far of similar<br />
changes following the transfer of human blastocysts. Nevertheless the<br />
WGNDRT felt that centres should pay particular attention to the<br />
outcome of this new form of treatment and caution patients accordingly<br />
in their patient information.<br />
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